1-15
4 Repeat steps 2 and 3 if necessary. Allow the loader to
operate at this setting until the oil temperature has
increased to 160° F (71ºC), operating temperature.
5 Turn the flow control valve further to restrict the oil
flow to no flow. (Zero) Correct pressure setting is 2400
PSI +/- 100 PSI. (165 Bar, +/-6.9 Bar)
6 If adjustment is necessary, shut down the auxiliary
hydraulic system, shut off the engine and return the flow
control valve to the open position. Locate the control
valve in the engine compartment.
7 Loosen the jam nut on the relief valve adjusting
screw and turn the screw clockwise, counting the turns,
until the screw bottoms out. (fig. C3435)
8 Turn the screw back out lesser turns than you turned
in to increase pressure, or out more turns to decrease
pressure.
9 Retake the pressure readings by performing steps 2
through 5. If necessary make further adjustments by
repeating steps 6 through 9.
NOTE: If inadequate pressure and / or flow is not
available, the gear pump could be failing, the intake to
the gear pump is restricted, or the filter in the relief
valve is clogged. (See pg. 25 for filter replacement).
Control Valve Replacement
1 Remove any attachment and shut off the engine
2 Disconnect the control cables, electrical solenoid
spool locks, and electrical auxiliary solenoid wiring
connectors if equipped. (fig. C3436, C3437)
3 Disconnect the the inlet hose coming from the gear
pump.Cap the hose and fitting and remove the adapter
fitting in the control valve. (fig. C3436)
4 Disconnect the 6 hoses going to the boom, bucket
and auxiliary circuits. Marking the hoses as you remove
them is recommended to ease re-assembly and assure the
circuits are functioning properly at restart.(fig. C3434)
5 Disconnect the return line from the control valve and
remove the adapter fitting. Plug and cap all open ports
and hose ends. (fig. C3436)
C3436
Solenoid coil
mounting nuts
C3437
Cable
cotter pins
C3434
C3869
Relief valve
Jam nut
Remove and tag hose location
CONTROL VALVE 1.3
Clean the work area prior to repair. Cap all open
lines, fittings and ports to prevent contamination.
IMPORTANT
Solenoid Coils Removed
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